2022
Automated analysers underestimate atypical basophil count in myeloid neoplasms
Shah HP, Tormey CA, Siddon AJ. Automated analysers underestimate atypical basophil count in myeloid neoplasms. International Journal Of Laboratory Hematology 2022, 44: 831-836. PMID: 35609868, DOI: 10.1111/ijlh.13882.Peer-Reviewed Original ResearchConceptsMyeloid neoplasmsBasophil percentageBasophil countsMyeloproliferative neoplasmsManual differentialMyeloid disordersFlow cytometryTertiary care centerChronic myeloid leukemiaMyeloid neoplasms patientsControl patientsMyelodysplastic diseasesMean ageNeoplasm patientsControl subjectsCare centerMyeloid leukemiaPatientsNeoplasmsAtypical appearanceScatter propertiesMyeloid diseasesBasophilsDisorder diagnosisCytometry
2021
Concurrent COVID-19 and babesiosis in an older, splenectomized patient
Jacobs JW, Siddon AJ. Concurrent COVID-19 and babesiosis in an older, splenectomized patient. Blood 2021, 138: 2154. PMID: 34821934, PMCID: PMC8614064, DOI: 10.1182/blood.2021013947.Peer-Reviewed Original Research
2020
Evaluation of Positive B- and T-Cell Gene Rearrangement Studies in Patients With Negative Morphology, Flow Cytometry, and Immunohistochemistry
Mendoza H, Tormey CA, Siddon AJ. Evaluation of Positive B- and T-Cell Gene Rearrangement Studies in Patients With Negative Morphology, Flow Cytometry, and Immunohistochemistry. Archives Of Pathology & Laboratory Medicine 2020, 145: 227-230. PMID: 32886749, DOI: 10.5858/arpa.2019-0663-oa.Peer-Reviewed Original ResearchConceptsGene rearrangement studiesBone marrow studyRearrangement studiesMarrow studiesLymphoproliferative disordersTCR gene rearrangement studiesT-cell receptor gene rearrangement studiesT-cell gene rearrangement studiesNegative bone marrowPeripheral blood findingsIg gene rearrangement studiesPeripheral blood assaysGene rearrangement resultsDate of testingHematologic outcomesBlood findingsFinal diagnosisPositive BSHematologic malignanciesMedical recordsPositive immunoglobulinSubsequent diagnosisBlood assaysDisease processBone marrowHow I Diagnose Low-Grade Myelodysplastic Syndromes
Siddon AJ, Hasserjian RP. How I Diagnose Low-Grade Myelodysplastic Syndromes. American Journal Of Clinical Pathology 2020, 154: 5-14. PMID: 32458977, DOI: 10.1093/ajcp/aqaa046.Peer-Reviewed Original ResearchConceptsLow-grade myelodysplastic syndromesMyelodysplastic syndromeMorphologic dysplasiaPeripheral blood cytopeniasCauses of cytopeniaDifficult diagnostic dilemmaBone marrow morphologyClonal genetic abnormalitiesRole of pathologistsBlood cytopeniasPeripheral bloodClinical recordsDiagnostic dilemmaMarrow morphologySecondary causesAncillary studiesIneffective hematopoiesisMyeloid neoplasmsMDS casesClinical heterogeneityDiagnostic algorithmResults of cytogeneticsGenetic abnormalitiesClonal hematopoiesisIndeterminate potentialCharacterization of circulating and cultured Tfh-like cells in sickle cell disease in relation to red blood cell alloimmunization status
Balbuena-Merle R, Santhanakrishnan M, Devine L, Gibb DR, Tormey CA, Siddon AJ, Curtis SA, Gallagher PG, Weinstein JS, Hendrickson JE. Characterization of circulating and cultured Tfh-like cells in sickle cell disease in relation to red blood cell alloimmunization status. Transfusion And Apheresis Science 2020, 59: 102778. PMID: 32439490, PMCID: PMC7483805, DOI: 10.1016/j.transci.2020.102778.Peer-Reviewed Original ResearchConceptsTfh-like cellsNaïve CD4 T cellsSickle cell diseaseCD4 T cellsCD4 T cell subsetsT cell subsetsT cellsCell diseaseRed blood cell alloimmunizationPeripheral blood mononuclear cellsBlood mononuclear cellsCD3/CD28Electronic medical recordsAlloimmunization statusHLA alloantibodiesRBC autoantibodiesRBC alloantibodiesFollicular helperIL-12Mononuclear cellsMedical recordsIL-7Antigen specificityB cellsAlloantibodies
2019
Use of B-Cell Gene Rearrangement Studies to Establish Clonality in Non-producer Non-secretory Multiple Myeloma
Mendoza H, Tormey CA, Siddon AJ. Use of B-Cell Gene Rearrangement Studies to Establish Clonality in Non-producer Non-secretory Multiple Myeloma. Clinical Lymphoma Myeloma & Leukemia 2019, 20: e18-e21. PMID: 31711890, DOI: 10.1016/j.clml.2019.10.012.Peer-Reviewed Original ResearchDUSP22-IRF4 rearrangement in AIDS-associated ALK-negative anaplastic large cell lymphoma
Wang M, Kibbi N, Ring N, Siddon A, Foss F, Totonchy M. DUSP22-IRF4 rearrangement in AIDS-associated ALK-negative anaplastic large cell lymphoma. BMJ Case Reports 2019, 12: e230641. PMID: 31570354, PMCID: PMC6768350, DOI: 10.1136/bcr-2019-230641.Peer-Reviewed Original ResearchConceptsAnaplastic large cell lymphomaPrimary systemic anaplastic large cell lymphomaSystemic anaplastic large cell lymphomaLarge cell lymphomaPoor prognosisSubcutaneous nodulesCell lymphomaGenetic testingALK-negative anaplastic large cell lymphomaBrentuximab vedotin monotherapySetting of HIVHIV-negative patientsCases of AIDSAnaplastic lymphoma kinaseHIV/AIDSComplete remissionDiffuse lymphadenopathyDisease courseFavorable prognosisLymph nodesAggressive lymphomaLymphoproliferative disordersLymphoma kinaseLymphomaAIDSRed blood cell alloimmunization is associated with lower expression of FcγR1 on monocyte subsets in patients with sickle cell disease
Balbuena‐Merle R, Curtis SA, Devine L, Gibb DR, Karafin MS, Luckey CJ, Tormey CA, Siddon AJ, Roberts JD, Hendrickson JE. Red blood cell alloimmunization is associated with lower expression of FcγR1 on monocyte subsets in patients with sickle cell disease. Transfusion 2019, 59: 3219-3227. PMID: 31355970, PMCID: PMC7075520, DOI: 10.1111/trf.15463.Peer-Reviewed Original ResearchConceptsSickle cell diseaseMonocyte subsetsTotal monocytesCell diseaseComplications of SCDRed blood cell alloimmunizationRed blood cell alloantibodiesElectronic medical recordsTransfusion exposureSerum cytokinesIntermediate monocytesRBC alloantibodiesInflammatory milieuCD64 expressionClassical monocytesPeripheral bloodInflammatory functionsMedical recordsAntibody formationClinical significancePatientsMonocytesFlow cytometryLow expressionResponders
2018
Modified approach to fibrinogen replacement in the setting of dysfibrinogenaemia
Chandler JB, Siddon AJ, Bahel P, Torres R, Rinder HM, Tormey CA. Modified approach to fibrinogen replacement in the setting of dysfibrinogenaemia. Journal Of Clinical Pathology 2018, 72: 177. PMID: 30463936, DOI: 10.1136/jclinpath-2018-205438.Peer-Reviewed Original ResearchFalse-Positive Light Chain Clonal Restriction by Flow Cytometry in Patients Treated With Alemtuzumab
Chen PP, Tormey CA, Eisenbarth SC, Torres R, Richardson SS, Rinder HM, Smith BR, Siddon AJ. False-Positive Light Chain Clonal Restriction by Flow Cytometry in Patients Treated With Alemtuzumab. American Journal Of Clinical Pathology 2018, 151: 154-163. PMID: 30307483, DOI: 10.1093/ajcp/aqy129.Peer-Reviewed Original ResearchConceptsHealthy donor bloodAlemtuzumab treatmentDonor bloodBone marrowFlow cytometryLight chain restrictionT-cell prolymphocytic leukemiaB-cell neoplasmsLight chain clonalityFlow cytometry analysisAutoimmune diseasesHematologic malignanciesImmunophenotypic analysisChain restrictionAlemtuzumabT cellsB cellsProlymphocytic leukemiaImmunoglobulin G1PatientsMonoclonal antibodiesCytometry analysisSimilar findingsBloodClonal restrictionBe careful of the masquerades: differentiating secondary myelodysplasia from myelodysplastic syndromes in clinical practice
Shallis RM, Xu ML, Podoltsev NA, Curtis SA, Considine BT, Khanna SR, Siddon AJ, Zeidan AM. Be careful of the masquerades: differentiating secondary myelodysplasia from myelodysplastic syndromes in clinical practice. Annals Of Hematology 2018, 97: 2333-2343. PMID: 30109425, DOI: 10.1007/s00277-018-3474-7.Peer-Reviewed Reviews, Practice Guidelines, Standards, and Consensus StatementsConceptsMyelodysplastic syndromeSecondary myelodysplasiaSecondary causesAllogeneic hematopoietic cell transplantationDiagnosis of MDSRepresentative case seriesUnderlying myelodysplastic syndromeHematopoietic cell transplantationLack of efficacyHematologists/oncologistsMeticulous exclusionResultant cytopeniasIntensive chemotherapyCase seriesMorphologic reviewCell transplantationDiagnostic dilemmaSuch therapyMalignant processExpert hematopathologistsClinical practiceMyelodysplasiaCytogenetic abnormalitiesPatientsSpecialized physiciansMorphology and flow cytometry of atypical basophils
Tormey CA, Siddon AJ. Morphology and flow cytometry of atypical basophils. Blood 2018, 132: 552. PMID: 30072417, DOI: 10.1182/blood-2018-05-850073.Peer-Reviewed Original Research
2017
R634W KIT Mutation in an Adult With Systemic Mastocytosis
Astle JM, Rose MG, Racke FK, Tormey CA, Siddon AJ. R634W KIT Mutation in an Adult With Systemic Mastocytosis. Lab Medicine 2017, 48: 253-257. PMID: 28520972, DOI: 10.1093/labmed/lmx026.Peer-Reviewed Original Research
2016
Successful Use of Four Factor-Prothrombin Complex Concentrate for Congenital Factor X Deficiency in the Setting of Neurosurgery
Siddon AJ, Tormey CA. Successful Use of Four Factor-Prothrombin Complex Concentrate for Congenital Factor X Deficiency in the Setting of Neurosurgery. Lab Medicine 2016, 47: e35-e37. PMID: 27378481, PMCID: PMC4985779, DOI: 10.1093/labmed/lmw037.Peer-Reviewed Original ResearchConceptsCongenital factor X deficiencyFactor X deficiencyX deficiencyExcessive bleedingComplex concentrateFour-factor prothrombin complex concentrateFactor prothrombin complex concentrateFirst-line therapyAnterior cervical discectomySetting of traumaProthrombin complex concentrateFresh frozen plasmaRare coagulation disorderMajor neurosurgeryCervical discectomyThromboembolic complicationsSpontaneous hemorrhageCoagulation disordersFrozen plasmaInvasive proceduresOperative casesBleedingWhite menDeficiencyDisordersMulti‐system complications of hypereosinophilia
Stahl M, Mohareb AM, Lee AI, Federman DG, Siddon AJ, Spelman J. Multi‐system complications of hypereosinophilia. American Journal Of Hematology 2016, 91: 444-447. PMID: 26700720, DOI: 10.1002/ajh.24283.Peer-Reviewed Original Research
2015
Is thrombin time too sensitive to dabigatran anticoagulation for clinical decision making in the setting of acute hemorrhage?
Siddon AJ, Rinder HM, Hendrickson JE, Tormey CA. Is thrombin time too sensitive to dabigatran anticoagulation for clinical decision making in the setting of acute hemorrhage? Annals Of Hematology 2015, 94: 1413-1414. PMID: 26027859, DOI: 10.1007/s00277-015-2406-z.Peer-Reviewed Original Research
2014
Cardiac FDG-PET to Assess Sarcoidosis in a Cardiac Allograft
Chen A, Khanna P, Siddon A, Russell R. Cardiac FDG-PET to Assess Sarcoidosis in a Cardiac Allograft. Clinical Nuclear Medicine 2014, 39: 54-56. PMID: 23603601, DOI: 10.1097/rlu.0b013e318279ffc7.Peer-Reviewed Original ResearchConceptsSteroid therapyF-FDG PET studiesEnd-stage heart failureCardiac FDG-PETOrthotopic heart transplantPresence of inflammationFDG-PET studiesImmediate posttransplant courseRecurrent sarcoidosisCardiac allograftsPosttransplant courseCardiac sarcoidosisEndomyocardial biopsyHeart failureHeart transplantFDG uptakeFDG-PETSarcoidosisPET studiesTherapyMonthsWall motionUptakeHypokinesisAllografts
2013
Pathology Consultation on Evaluating Prognosis in Incidental Monoclonal Lymphocytosis and Chronic Lymphocytic Leukemia
Siddon AJ, Rinder HM. Pathology Consultation on Evaluating Prognosis in Incidental Monoclonal Lymphocytosis and Chronic Lymphocytic Leukemia. American Journal Of Clinical Pathology 2013, 139: 708-712. PMID: 23690112, DOI: 10.1309/ajcplir4gzwx3xka.Peer-Reviewed Original ResearchMeSH KeywordsADP-ribosyl Cyclase 1Beta 2-MicroglobulinFlow CytometryGene Rearrangement, B-LymphocyteHumansImmunoglobulin Heavy ChainsImmunoglobulin Variable RegionIncidental FindingsLeukemia, Lymphocytic, Chronic, B-CellLymphocytosisMaleMiddle AgedMutationPrognosisWatchful WaitingZAP-70 Protein-Tyrosine KinaseConceptsChronic lymphocytic leukemiaEarly-stage chronic lymphocytic leukemiaStage chronic lymphocytic leukemiaDisease progressionLymphocytic leukemiaImmunoglobulin heavy chain variable (IGHV) gene mutational statusMonoclonal B-cell lymphoproliferative disorderLaboratory evaluationOvert chronic lymphocytic leukemiaMonoclonal B-cell lymphocytosisB-cell lymphoproliferative disordersAggressive disease progressionSignificant disease progressionIndolent clinical courseSerum β2-microglobulinRoutine laboratory evaluationB-cell lymphocytosisZAP-70 expressionGene mutational statusMonoclonal lymphocytosisClinical courseExpectant observationLymphoproliferative disordersTherapeutic optionsPrognostic marker
2012
Human herpesvirus 6 positive Reed–Sternberg cells in nodular sclerosis Hodgkin lymphoma
Siddon A, Lozovatsky L, Mohamed A, Hudnall SD. Human herpesvirus 6 positive Reed–Sternberg cells in nodular sclerosis Hodgkin lymphoma. British Journal Of Haematology 2012, 158: 635-643. PMID: 22757777, DOI: 10.1111/j.1365-2141.2012.09206.x.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAdultAge FactorsAgedBlotting, WesternCell Line, TumorDNA, ViralEpstein-Barr Virus InfectionsFemaleHerpesvirus 4, HumanHerpesvirus 6, HumanHodgkin DiseaseHumansImmunohistochemistryLymphoma, FollicularMaleMiddle AgedPolymerase Chain ReactionReed-Sternberg CellsRoseolovirus InfectionsSclerosisYoung AdultConceptsNodular sclerosis Hodgkin lymphomaNodular sclerosis HLHHV-6 DNAEpstein-Barr virusHHV-6Hodgkin's lymphomaReed-Sternberg cellsPolymerase chain reactionRS cellsNSHL casesEBV-negative diseaseReactive lymphoid hyperplasiaClassical Hodgkin lymphomaBi-modal age distributionHHV-6 genomeYounger patientsInfectious etiologyLymphoid hyperplasiaPCR positivityYounger ageImmunohistochemistryMost casesConflicting resultsChain reactionCD30Normalized CCND1 expression has prognostic value in mantle cell lymphoma
Siddon AJ, Torres R, Rinder HM, Smith BR, Howe JG, Tormey CA. Normalized CCND1 expression has prognostic value in mantle cell lymphoma. British Journal Of Haematology 2012, 158: 551-553. PMID: 22671703, DOI: 10.1111/j.1365-2141.2012.09181.x.Peer-Reviewed Original Research